Record controlled accounting machine



I May 8, 1945. 5. BRAND ETAL RECORD CONTROLLED ACCOUNTING MACHINE 10 Sheets-Sheet 1 Filed March 3, 1942 w L w H w n W a L A L m w x Z 9 5 7 6 5 3 Z 1 0 U. W V l 1 1 1 1 1 1 q W H G 1M1. '0. 41h 1v T '5 mm nu.. I Z k R 1 c c 1 1 3 1 R \HL m C\\ HM. H 6 u +1.6 4 4 4 4 4 4 4 R nu R q w H d c 5 b h R mgr-z TORS FIG. 1

ATTORNEY y 1945- 5. BRAND ETAL 2,375,275

RECORD CONTROLLED ACCOUNTING MACHINE Filed larch 3, 1942 l0 Sheets-Sheet 2 W v L1 3/4 1/ A/5/Z 020M 200M406 9 1 1 1 Y 5 -4 8 1 1 1 7 1 1 1 I 6 1 1 1 Ml/LT/PL/CANO 5 1 I 4 1 1 1 3 1 1 1 2 1 1 1 a 1 1 1 1 C5] C52 0 1 1 i 1 TH L /-l Z A'TTORNEY May 8, 1945- 5. BRAND EI'AL RECORD CONTROLLED ACCOUNTING MACHINE Filed larch 3, 1942 10 Sheets-Sheet 3 May 8, 1945.

4 5. BRAND ET AL RECORD CONTROLLED ACCOUNTING MACHINE Filed larch 3, 1942 10 Sheets-Sheet 4 l l nu m /w/ fl mww 4 May 8, 1945.

5. BRAND ET AL RECORD CONTROLLED ACCOUNTING MACHINE Filed larch 3,

1942 10 Sheets-Sheet 5 n un n H Huma I I I I &1 m y Unfi un H n u n u n H m 229 U/V/TTS PflR T/IPL moouzrs O.

7Z'NS P/Mr/AL mmoac rs s I N TORS yd kgm ATTORNEY.

y 1945- I 5. BRAND ETAL 2,375,275

RECORD CONTROLLED ACCOUNTING MACHINE Filed March 3. '1942 10 Sheets$heet e I ENT R5 XW Woman M y 1945. 5. BRAND ETAL 2,375,275

RECORD CONTROLLED ACCOUNTING MACHINE Filed March 5. 1942 10 Sheets-Sheet v 223 I ENTORS HORNE Y 'May 8, 1945- s. BR AND ETAL RECORD CONTROLLED ACCOUNTING MACHINE Filed March 5, 1942 10 Sheets-Sheet 8 59:13, 5 I R Y W 0 E m m a I A m a v Mun con mars 840- y 5. BRAND ETAL 2,375,275

RECORD CONTROLLED ACCOUNTING MACHINE Filed March 5, 1942 10 Sheets-Sheet 9 Mar/Pun? $425504: IPJ'rzwrr CAM 2.57

$010M .swrr 170117157; CAM 260 FIG. I8.

5 ENTORS ATTORNEY.

May 8,' 1945.

5. BRAND ETAL RECORD CONTROLLED ACCOUNTING MACHINE Filed March 5, 1942 10 Sheets-Sheet -10 as INVENTORS a W ORNEY.

Patented May 8, 1945 UNITED STATES PATENT OFFICE REOORD CONTROLLED ACCOUNTING MACHINE Application M 1942, Serial No. 433,178

6 Claims.

This invention relates to calculating machines and more particularly to machines in which multiplying operations are performed.

The object of the invention is to provide improved mechanism for carrying out multiplication. The machine is provided with devices for creating the so-called "partial products, and it is a specific object of the invention to provide improved mechanism for more expeditiously selecting partial products in succession.

Other objects of the invention will be pointed out in the following description and claims and illustrated in the accompanying drawings, which disclose, by way of example, he principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Figs. 1 and la taken together with Fig. 1 placed above Fig. la constitute a wiring diagram of the circuit connections of the device.

Fig. 2 is a view showing the general arrangement of the device.

Fig. 3 is a view looking in the direction of lines 3-3 of Fig. 2 showing the partial products drum and the selecting mechanism therefor.

Fig. 4 is a detail of parts shown in Fig. 3 set in a diiferent position.

Fig. 5 is a development of the partial products drum.

Fig. 6 is a detail of one of the emitters, the view being taken in the direction of lines 6-6 of Fig. 2.

Fig. 7 is a sectional view of the emitter shown in Fig. 6.

Fig. 8 is a view taken along lines 8--8 of Fig. 3.

Fig. 9 is adetail taken along lines 9-9 of Fig. 8.

Fig. 10 is a detail taken along lines IIl-I0 of Fig. 3, showing the partial products drum in its relationship to the controlled contacts.

Fig. 11 is a'view of one of the double order accumulator plates.

Fig. 12 is a sectional view through one of the accumulating elements, the section being taken 310112111165 I2I2 of Fig. 13.

Fig. 13 is a view of one of the accumulating crders -tbe view looking from th opposite directies. to that from which Fig. 11 is viewed.

'Fig.- 14. is a view of the column shift mechamsm.

Fig- 15 is a central section section through the c lumn shift mechanism and taken along lines "I5 of, Fig. 14.

Fi 16 is a plan section taken on lines- I6-I6 of Fig. 14. 7

Fig. 17 is a detail of one of the contact plugs of Fig. 15.

Fig. 18 is a chart showing the time of operation of various cam controlled mechanisms and the time of opening and closure of various contact devices,

Fig. 19 is a view of the drive gear g or the device.

Factory entry receiving devices Referring to Fig. 1, there is shown in. a diagrammatic manner a device upon which a four.

place multiplier amount may be set. This de vice comprises four denominationally ordered contact bars 3, alongside of each of which is a row of contact arms 3I2 having digital values as indicated. An amount is represented on the device by rocking the digit representing contact arms 3|! intoengagement with the bars 3 to make contact in columns and rows representative of the amount of the multiplier. 'I'hus, as shown in Fig. 1 the multiplier 1239. is represented by the rocking of the l, 2, 3, 4 arms in the thousands, hundreds, tens and units orders, respectively, into contacting engagement with their related bars 3. This device is shown diagrammatically inasmuch as the particular mechanism for effecting a setting is not part of the present invention, and it may therefore be assumed that an amount is set up by manually rocking the contact arms in selected positions.

An exactly similar device is provided to receive a multiplicand entry as shown in Fig. 1a where arms 3I2 are rocked to represent a multiplicand entry of 4368. I

Drive.A continuously running motor through belt I6I drives a pulley I62 (Figs. 19 and 2) secured to pinion I63 which meshes with and constantly rotates a gear I66. Secured to gear I64 is a clutch driving member I65 which, with gear I66; is freely mounted on a shaft I66. To the shaft is secured arm I61 which carries spring-pressed dog I68, the arm and dog beingnormally held as shown in Fig. 19 by latching armature I69 of magnet I10. When magnet I16 is energized; dog I66 is released to effect coupling between shaft I66 and member I65. Shaft I66 has secured thereto a gear H! which through an idler I12 drives a gear I13 on a shaft I14. The shafts I66 and I14 are the accumulator drive shafts which along their lengths carry gears I11 (Fig. 11) of which there is one for each accumulator order.

scribed is not novel per se but is the same with the omission of subtracting magnets as described in Patent 2,165,288, granted Jul 11, 1939, to A. W. Mills. Referring now to Fig. 11, the gear I11 of each order constantly drives a gear I18 (see also Fig. 12) which is freely mounted on a stud I19 secured in plate I80. The plate I60 carries two gears I18 to provide for two denominational orders of an accumulating unit. As shown in Fig.

11, the plate I80 is vertically slidabl with its gears I18 away from the gears I11 and in this manner the plate I80 with the mechanism mounted thereon maybe removed from the machine for repair or replacement.

As viewed in Fig. 12, the gear I18 has secured thereto by means of riveted pin I80 a disk I 8I. Pin I80 extends into opening I83 in a ratchet I84, which ratchet is freely mounted on the hub I85 of the disk I8I and is normally held against the disk, as shown in Fig. 12 by a leaf sprin I88. Adjacent to ratchet I84 is the accumulating wheel I81 which is provided with ratchet teeth I88 and detenting teeth I89. The accumulating wheel I81 is freely rotatable on the stud I19 and is driven by the ratchet I84 when the latter is rocked into engagement with the teeth I88. This rocking is eiiected by means of a beveled disk I90 in the manner fully explained in the Mills patent referred to.

The accumulating wheel I81 is normally locked by detenting arm I9l whose free end rests between two adjacent teeth I89 and affords a positive restraint against movement of the wheel in either direction. The arm I9I is pivoted on stud I92 and has pin and slot connection with the supporting arm I94 of the beveled disk I90. Upon counterclockwise rocking of the arm I94, the beveled disk I 90 will cause engagement of the ratchet I84 with the teeth I88 and at the same time the pin and slot connection I93 will cause withdrawal of the arm I 9| from between teeth I89. The proportioning of the parts is such that the engagement of the ratchets is effected before the arm MI is fully disengaged to insure that the wheel I81 is controlled by either one or the other. The parts will remain in engaged position to drive the accumulating wheel until the arm I94 is again rocked clockwise to its original position. This is effected by a cam roller I 91 (Fig. '11) which is-carried by the driving gear I18. The roller I91 engages an extension I98 of the arm I94 and causes positive rocking of the latter. During such rocking, the arm I9I is brought into engagement with the teeth I 89 preventingfurther rotation thereof.

The initial rocking of the arm I94 is controlled by a pair of magnets I99 which, upon energizetion, attracts its armature 200 to release a lateral extension of arm I94, whereupon spring I will rock the arm I94 in a counterclockwise direction. It will thus be seen that the accumulating wheel I81 may be clutched to the driving ratchet I84 when the magnet I99 is energized, and declutching will take place when roller I91 strikes extension I 98. I

The wheel I81 carries a disk 201 which controls the positioning of the usual tens carry contact mechanism. The disk 201 is provided with a notch '208 and a high portion 209 which cooperate with a finger 2I0 which is pivoted at 2. The arrangement is such that, when the accumulating wheel registers 9, finger 2I0 will be in engagement with the notch 208 and through the insulating roller 2! 2 the lever 2I3 carrying brush 2I4 will be permitted to rock under conaavaa'zs contact with a contact member Zita When the wheel passes from 9" to 0, the finger 210 will be engaged by extension 209 and rocked clockwise to a position in which it is held by a spring-pressed latch 2I8 (Fig. 11). In this position the roller 2I2 will have rocked the arm 2 I 3 so that brush 2 makes contact with the contact member 2I9. This position of the brush 2I4 is maintained until the roller 220 carried by the gear I 18 causes unlatching.

A brief explanation will now be given to indicate the manner in which the parts are timed in relation to the rest of the machine. Referring to the timing chart (Fig. 18), two accumulating cycles are shown with the timing of the accumulator cams indicated. The numerals 9, 8 1, above the accumulator clutch teeth represent the points in the cycle when the accumulator magnets I98 are fully energized. Thus, if a 9" is to be added, a circuit to the magnet I98 is completed at the 9 time and wheel I81 is rotated through nine steps, at which time the clutch knockout roller I91 will cause disengagement of the clutch. If the magnet I99 had been energized at the 3 time, the clutch engagement would have taken place at the "3" time and have been disengaged by the roller I91 after three steps of movement. It is thus seen that the time of engagement is variable and the knockout or disengaging time occurs at a fixed point in the cycle. In the interval between the two camming rollers I91, carry operations take place under control of the contacts 2I4, 2P8, 2I9 to add a unit into appropriate orde The time of completion of this carry circuit i: one point before the second camming roller 91 eifects clutch disengagement.

For enabling the reading out of the amount standing in an accumulator order, each wheel "1 has integral therewith a brush structure 223 (Figs. 12 and 13) comprising two brushes electrically connected to one another and insulated from the wheel. In the path of the brushes is fixed a commutator having ten segments 224 and a common segment 225. When a digit is entered in the accumulator, the brush structure takes a position wherein one brush contacts the segment 224 corresponding to the digit and the other brush contacts segment 225, thus forming an electrical connection between the two.

C'am contacts and emitters The machine is provided with a number of cam contacts, circuit breakers and emitters controlling the completion of the circuit connections of the machine. These devices are shown in Fig. 2 where the shafts 228, 221 serve to support the same. Shaft 221 has a gear 228 at one extremity which through an idler 229 meshes with the gear I" secured to shaft I88. Gear 228 also meshes with a gear 230 on the shaft 228 with the diameter of gear 230 one-half that of gear 228. At one end of shaft 228 are three circuit breaker contacts designated CBI, C32 and CB3 which are controlled by scalloped periphery cams of insulating material. At the other end of the shaft 228 are conventional cam-controlled contacts designated CC I to CCI I. The timing of the various contacts is shown in Fig. -18. Near the center of shaft 228 are nine emitters designated El to E9. These emitters which are shown in section in Fig. '1 are of conventional construction comprising a ring of individual segments and a common ring which are bridged by brushes mounted on the shaft. These emitters are represented in the circuit'diagram in the conventional manner. A

special emitter E18 is provided (see Fig.8) wherein the ring of individual segments 23| is traversed by two brushes 232 and 233 spaced one position 5 apart. Each brush is electrically connected to a parallel companion brush, one of which traverses a common segment 234 and the other a common segment 238. With this arrangement the individual segments 23| are successively electrically connected to the common segment 235, and one step later the same segments are also connected to the common ring 234. On the lower shaft 221 are cam-controlled contacts (Fig. 2) designated DCI to DC whose timing is also indicated on the timing chart (Fig. 18).

Through the gear connections traced, the shaft 228 will make one revolution for each cycle of operation of the accumulator mechanism, while shaft 221 makes one revolution for each two cycles 20 of the accumulator mechanism, and the shafts operate only when the accumulating mechanisms v are coupled for operation through the clutch mechanism I85, I88 by the magnet I18. The

functions which are performed by the various circuit breakers, cam-controlled contacts and emitters will be more particularly pointed out in connection with the circuit diagram.

The multiplying mechanism 8 Slidably mounted on the shaft 221 (Figs. 2 and 3) is a multiplying drum or cylinder generally designated 238 which carries two semi-circular plates 231 and 238 in which are openings or perforations 238 arranged in accordance with the 38 multiplication table. Along the side of the drum are located nine pairs of contacts 248 (see also Fig. 10). These pairs of contacts are provided with fingers 2 which traverse the surface of the plates 231 and 238 in line with the perforations 40 239 and, when they encounter a perforation, drop therein to effect closure of the related contacts 248. In Fig. 5 there is shown the development of the plates 231 and 238, the former of which is perforated in accordance with the tens digits and the latter in accordance with the units digits of the various products obtainable.

The drum may be shifted along its axis to any of ten positions in accordance with a selected multiplier digit. Thus, for example, in Fig. 5 the arrows representing the fingers 2 are shown in position to traverse the plates 231 and 238 in the 9" multiplier relationship. As the plates advance in the direction of the arrow at the right Fig. 5), finger 2n farthest to the right will first drop into the 1" opening 239 in plate 238 and later will drop into the 8" opening of the plate 231. The time at which the fingers drop in the openings is coordinated with the timing'of the accumulating mechanism, that is, the 1 opengram.

Drum positioning mechanism-The drum 238 is freely slidable on the shaft 221 and is provided with two camming projections 242 (Figs. 2 and 3) which cooperate with a roller 243 which is posi tioned in the path of rotation of the camming surfaces, which upon striking the roller will cause shifting of the drum in either direction according The circuits to a presetting of the roller. The roller is carried by an arm 244 pivoted at 248 and is integral with an arm 248 in whose end are notches 241. Lying adjacent arm 248 is a lever 248 which is also pivoted at 248 and which makes contact with the arm 248 through an adjustable screw 248. One end of arm I48 carries a roller 288 controlled bya cam 28l secured on the shaft 221 (see Fig. 8). Springs 282 and 283 tend to bias arms 248 and 248 in a clockwise direction while cam 28! controls their movement in a counterclockwise direction. As cam 28i revolves, the two arms move together in the relationship shown in Fig. 4 so that the notches 241 successively pass the toe of a sprirmpresse'd'armature pawl 284. During this movement, the magnet 288 may be selectively energized as will be explained in connection with the circuit diagram to rock pawl 284 into any of the notches 241. This will interrupt further movement of arm 248 while arm 248 continues its movement, wherein a pin288 in its extremity moves up with the arm to broken line position shown in Fig. 4, wherein the pin 258 takes a position behind the actuated pawl 284 to lock the same in the selected notch. When the magnet 288 is not energized during the advance of arm 248, the pawl 284 will engage the lowermost notch representing 0 and pin 288 will strike the pawl 284 and move it into this notch, so that the parts 0 occupy the position shown in Fig. 3.

It will be apparent from the foregoing that the roller 243 on arm 244 is differentially positioned and locked in such position. This positioning takes place during the interval that the cams 242 are out of engagement with the roller, so that when the cams next contact the roller 243, the drum is moved directly in either direction to its next setting. Reference to the timing diagram (Fig. 18) will indicate the relative time in the cycle that the selector is positioned and the drum I in the drum control the contacts 248. At this time the drum is free of the positioning roller 243, so that a new setting of the roller may be effected while the tens digit are read out according to the prior selection. To hold the drum in its various positions, there is provided a detenting arrangement shown in Fig. 9 which comprises a rod 281 secured in cam 28L This rod is provided with notches 288 which cooperate with a pair of spring-pressed plungers 288 (see Fig. 8) mounted in drum 238. The plungers alternately co perate with the spaced notches 288 in the rod 251.

Column shift unit In Figs. 14 and J5 is shown the column shift mechanism which is utilized for directing the circuits from the multiplying mec anism to the appropriate accumulators which are to receive the same. This mechanism serves to allocate the entries into the proper denominational positions. The mechanism is located to the left of the accumulators (see Fig. 2) and is operated under control of a cam 268 which is secured to the shaft I14. The cam 288 cooperates with a roller Edi which is mounted on the lower end oi a plate (Fig. which is urged downwardly by a spring 263. On the plam s secured a bloch 226G oi insulating material in which are embedded a metallic conductor 265 and a group of six metallic conductors 266. Pressing against the blecl: 256 are a number of spring-pressed contact plungers, one of which is shown in Fig. 17. These plungers are arranged as shown in Fig. M- where they are grouped with twelve of them comprising a group designated 26?, six comprising a group 2653, the further group of six are designated and a further single contact is designated Each of the contacts is arranged in the of a socket to receive the end of a plug wire through which connection may be made toappropriate circuits. The contacts are mounted a stationary block 2V2 so that they press against the block 264 and plate 262 urging the latter against guide rollers 2713. As cam revolves, the conductor 2'65 in block 26 3 is elevated so that it makes connection between contactor and each of the contactors 268 in succession. At the same time the six connectors 268 are connected to the six lowermost sockets 2t? and successively to the higher sockets.

As the plate 262 descends, it m-v he interrupted in any one of its several connecting positions. This is effected by means of a plurality of ratchet teeth 274 in an extension 215 of plate These teeth'are arranged to be engaged by a spring-pressed pawl 216 which, when a magnet 2"? is energized, will intercept one of the teeth 2%. The manner in which magnet 211 is enersized and the controls for determining the order in which the teeth 214 are to be intercepted will he explained in connection with the circuit diagram. When the plate 262 is in its extreme uppermost position, a high portion of the exten- 21270;! 215 serves to engage and restore the pawl Multiplying operations The machine is now about to enter upon multiplying operations during which the multi= plier and multiplicand factors are multiplied and gara es accordance with the digital value of the lowest order of the multiplier.

Following the setting of arm 246 (Figs. 4, 3), the rotation oi the multiplier drum will bring its cam 2&2 into engagement with the now positioned roller 243, so that the multiplying drum will adjust itself along shaft 221' in accordance with the selected digit 4. This positions the drum relatively to the fingers 241 of the multiplying contacts 34%, so that they traverse the portions of the cam related to the multiplier digit 4.

Column shift selection.While the multiplying drum is being positioned in accordance with the selected multiplier digit, the column shift plate partial products, as they are derived, are directly entered into the product accumulator.

Assuming the driving motor to be in operation, and amounts set up on the multiplier and multiplicand devices of Figs. 1 and 1a, clutch magnet 610, (Fig. 19) may be energized by any suitable means and will thereupon effect coupling of the accumulator shafts I66 and i1 as well as the cam shafts 22s and 221 to the main drive, so that the several elements now operate with the timing indicated in Fig. 18.

Circuit for shifting the multiplier.Referrlng now to Fig.1, a. circuit is now traceable from line 380, circuit breaker contacts CB3, emitter E9 to the readout device of the multiplier device, the circuit extending through the 4 contact 3 in the fourth position from the left, its common strip 3, thence through relay contacts R80, magnet 256 to line 33!. Thus, magnet 255 will be energized at a time in the-cycle (see Figs. 3, 4)

when the 4 tooth of arm 246 is opposite the toe of armature 264 controlled by the magnet 255 so that the am 246 will be intercepted in the position shown in Fig. 4.' The configuration of the tooth 241 will hold the armature in the position shown until locking pin 256 moves into its broken line position to positively lock the armature into the selected tooth position. In this manner the position of the multiplying drum is selected in 2% (Figs. l4, 15) is moved upward by its restoring cam 268 and then moves downwardly under spring control. During such downward movement, it is differentially positioned in accordance with the setting of the column skip relays R5 to R8 of Fig. l. A circuit is now traceable from line circuit breakers CB3, column shift magnet ill, cam contacts DCE, common ring 235 (see also Fig. 7), brush 232, first segment 23l, upper contacts Rt?) to line 33L The timing of the emitter Eli is such that the magnet 211 is energized to engage the lowermost tooth 214 (Fig. 14) to position the column shift slide 262 to its highest active position. In such position the six conductors 266 in Fig. 14 are separately connected to the six highest contactors 261 to connect these contactors to the six contactors 268. In Fig. 1a are shown eight of the contactors 261 and four contactors 268, which are indicated as being relatively shiftable by plate 264 toward the left.

Selecting and entering right hand partial products.--The partial products drum now rotates to move the units plate 238 (Fig. 5) past the fingers 26! in unison with the movement of the accumulator mechanisms, so that the axial digital positions of the drum related to the digits pass the fingers 241 as the corresponding digital positions in the accumulators move through the corresponding positions for entering related digits. Thus, for the problem chosen with the lowest order of the multiplicand digit being 8 and the active multiplier digit 4, a circuit is traceable at the 2 time in the accumulating cycle from line 830 (Fig. la), circuit breakers CB1 CB2, the 8 contacts 246, the 8 contacts 3l2 in the fourth column from the left of the multiplicand device, the fourth conductor 314, column shift contactors 268, 261, right hand magnet 1991 to line 331. The timing of the circuit to occur at the 2 time is controlled by the configuration of the unit pertlal products section of the multiplying drum in accordance with the multiplication table. Durin the same cycle parallel circuits are completed at different times in the cycle to enter into the other orders of the accumulator digital values representing the right hand orders of the partial prodnot of the multipllcand amount times the multiplier digit 4.

The cycle during which the units partial products are entered into the accumulator i the one to the right in Fig. 18 from which it will be observed that, after the operation of the drum contacts 240 in this cycle, the column shift ratchet cam 260 operates to restore or elevate the column shift plate 262 (Figs. 14, 15) and permit this plate to descendduring the latter part of this cycle. It is also to be observed that during the descent of the plate cam. contacts DC close and their timing is such that they complete a circuit from line 330 (Fig. 1), circuit breaker CB3, column shift magnet 211, contacts DC4, collector ring 234 of emitter EH1, brush 223, the first segment 23l, the upper contacts R8b, to line "I. This is substantially the same circuit as previously traced through the magnet 211 with the exception that it now passes through the brush 233 instead of 232 and, due to their relative displacement, the circuit is-completed at a slightly later time so that the column shift plate 282 of Fig. 14 will move down one step farther than previously before it is intercepted. The column shift mechanism when thus set up will properly adjust the connections for directing the tens partial product digits into the proper orders of the product accumulator during the next succeeding cycle, which is the one to the left in Fig. 18.

It is to be noted that during this cycle the multiplying drum remains in the position along the axis in which it was P eviously set and that during this cycle the second section containing the notches representing the multiplication table for the tens partial products controls the operation of the drum contacts 240. The circuits for controlling the entry of the tens partial products are completed in exactly the same manner a for the units partial products, so that they need not be specifically retraced, it being remembered, however, that the column shift connections will, through their preadjustment, direct .the entries into the appropriate; denominational orders of the accumulator.

Selection of the second multiplier digit.-The adjustment of the column shift plate 262 for adjusting the circuits during this present cycle has also adjusted the conductor 285 (Figs. 14 and 1) from the dotted to the full line position in the latter figure, wherein it will permit the completion of a circuit during the early part of the cycle upon closure of cam contacts D06 which is traceable from line 330 (Fig. 1), contacts DCG, contactor 210, conductor 265, contactor 268 farthest to the right, relay magnet R8 to line 33!. The magnet R8 will close its contacts R8a to provide a holding circuit for itself. In the meantime, drum selector ratchet plate 246 of Fig. 3 has been restored without disturbing the position of the multiplier drum, which drum is held in position by the detenting mechanism described.

As the plate 246 now rocks through its selecting stroke in synchronism with the operation of emitter E9, a circuit is completed to select the next multiplier digit which is 3 for the example chosen. Thus, when the 3 tooth 241 is in selecting position, the magnet 255 is energized through a circuit from line 330 (Fig. 1), contacts CB3, emitter E9, through its 3 segment, corresponding wire, to the 3 contact 3I2, the third column from the left of the readout device of the multiplier device, thence through the common conductor 314, right hand contacts R'lc, left hand con tacts R80, magnet 255 to line 33L As a result, the control setting for the next position of the multiplying drum is determined so that, near the end of the cycle, the multiplying drum will adjust itself in accordance with the next multiplier digit. Also, during the latter part of the cycle the column shift mechanism will readjust itself in accordance with the entry condition for the units partial products obtained by multiplying by the second order digit of the multiplier.

It is to be noted that the column shift condition for the next following cycle must be the same as for the one just completed, so that the column shift magnet 21! must be energized at the same point of time. The circuit for eflecting this is 7 traceable in Fig. 1 from line 330, contacts CB3, cam contacts DC5, collector ring 235 and this time through the advance brush 232, the second segment 23!, upper contacts R'lb, lower contacts R827, to line 33L It is'to be noted that energization of magnet 211 in the previous cycle occurred with brush 233 on the first segment. The present circuit is also completed when the brush 233 is on the first segment, although the actual completion is through the brush 232, It is thus apparent that the timing of the completion of the two circuits is at the same point of time in the respective cycles.

Multiplying operations proceed, taking two relay magnet R49, lower contacts R51) to R8b inseries, to line 33!. The relay magnet R49 terminates multiplying operations by effecting deenergization of clutch magnet I10 (Fig. 19) in a manner not shown, and as a result the parts come to rest with the product set in the accumulator.

. While there has been shown and described and pointed out the fundamental novel features of the invention as applied to a single modification, it will be understood that various omissions and substitutionsand changes in the form and details of the device illustrated and in its operation may be made by those skilled in the art without departing from the spirit of the invention. It is the intention therefore to be limited only as indicated by the scope of the following claims.

What is claimed is:

1. In a cyclically operable multiplying machine, having a drum containing configurations representing partial product values for all possible multiplier and multiplicand digit factors, said drum being positionable along its axis to any one of a number of digit representing positions, means for rotating the drum, a set of digit representing contacts cooperable with the configurations of the drum during its rotation for completing partial product entering circuits, a device settable to represent a multiplier digit, and means controlled by said settable device for positively moving said drum axiall in either direction directly from any of its positions to any other position to bring certain of the configuratlons in cooperative relationship with the set of contacts, said set of contacts being arranged in a line coaxial with the drum.

2. The invention set forth in claim 1 in which the drum has integral therewith cam mechanism, arranged and constructed to cooperate with the means controlled by the settable means to cause movement of the drum in either direction from one position on its axis directly to the next posiion.

3. The invention set forth in claim 1 in which the moving means comprises a cam guide differentially positionable along a line parallel to the axis of the drum, and a pair of opposite cam surfaces integral with the drum and engageable with the guide during a period in the rotation of the drum to cam the drum axially to a position predetermined by the initial location of the guIde.

4. The invention set forth in claim 1 in which the moving means comprises a cam guide, means 'iactors, said member being continuously movable in one direction and positionable in a transverse direction to any one of a number of digit representing positions, a set 01' digit representing elements arranged in a line, means for moving the member in a direction transverse to said line of elements, whereby said elements are cooperable with the configurations oi the member for effecting partial product entries into said accumulator, a device settable to represent a multiplier digit, means controlled by said settable de- 10 rations of the drum during its rotation for completing partial product entering circuits, a multiplier receiving device having denominationally ordered elements, means for reading a different element during each cycle of the machine, a de- 15 vice movable each cycle through a succession oi positions representative or th digits, means controlled by one of said elements in each cycle for interrupting said device at the digital position representing the setting of the element read dur- 20 ing the related cycle, and means controlled by said settable means ior positively moving said drum axially to bring certain of the configurations in cooperative relationship with the set of contacts, said set of contacts being arranged in vice for positively moving said member in a di- 85 a line coaxial with the axis oi rotation of the rection parallel to said line or elements in either direction from any oi its positions to any other position to select a certain part oi the configurs tions for control oi! said elements during the of (Correction Fatont l lo, 2,375,233

drum.

SAMUEL BRAND. JAMES M. @UNNDXGHAM.

May 8, W45,

ARIA A. h lAXWELL it is hereby certified thatcrrors appear in the printed specification of the above numbered patent requiring correction as follows: Page 3, second column, line 27,

after tapered insert section; page i, first column, line 73, after also insert so; page 5, second column, line '7, claim 2, for expanded read expanding; and line 55, claim 4, for these read mus; page 6, first column, line 61, claim 7, after it insert is; and line 69, same claim, strike out the article a; and second column, line 21, claim 8, strike out at the cage 5 and that the said Letters Patent should be read with these correcticns therein that the some may conform to the record of the case in the latent Ufice.

Signed and sealed this 29th. day of @ctober, A. D, 194".

LESLIE FRAZER, I 

